Baserow uses Redoc to create the rest api documentation.
The api-docs in the frontend use table schemas to provide specific examples of how to call the backend APIs. So they’re the same, but while the backend shows more general documentation, the api-docs in the frontend display specific examples using table IDs, field types, and so on.
The OpenAPI specifications can only be available for the backend, as api-docs relies on user data to create ad-hoc requests.
So, tl;dr - Baserow API spec is the only option to get the full openapi schema